I also have the same problem from time to time. I solve it by killing the adb.exe from the taskmanager (not closing the emulator). Eclipse will(or at least should) recognize that there is still an emulator up and will start a new adb.exe to connect to the existing emulator instance to reuse it.

I also have the same problem from time to time. I solve it by killing the adb.exe from the taskmanager (not closing the emulator). Eclipse will(or at least should) recognize that there is still an emulator up and will start a new adb.exe to connect to the existing emulator instance to reuse it.